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Armitage JN, Irving SO, Burgess NA; British Association of Urological Surgeons Section of Endourology.Armitage JN, et al.Eur Urol. 2012 Jun;61(6):1188-93. doi: 10.1016/j.eururo.2012.01.003. Epub 2012 Jan 11.Eur Urol. 2012.PMID: 22244778